CVE-2025-33033
Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.
NVD · uneditedA path traversal vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to read the contents of unexpected files or system data. We have already fixed the vulnerability in the following version: Qsync Central 4.5.0.7 ( 2025/04/23 ) and later
Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.
dbcve analysis · moderate confidenceA path traversal vulnerability in Qsync Central allows an authenticated remote attacker to access files outside the intended directory by manipulating file path inputs, potentially exposing sensitive system data.
Verify against the referenced sources before acting — the references below are authoritative for this CVE, this summary is not.
Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.
NVD · CPE data>= 4.5.0.3, < 4.5.0.7CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.
From the vector- Attack vector
- Network
- Complexity
- Low
- Privileges
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- None
- Availability
- None
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Am I affected? How to checkSteps we derive from the advisory and the affected-version data, so you can decide whether this CVE reaches your setup. They are a guide, not a scan — your own configuration is the authority.
dbcve checksWork through these to decide whether this CVE applies to you.
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Confirm Qsync Central is installedAccess the QNAP admin console, navigate to App Center or the Qsync section, and verify Qsync Central application is present on the system.Affected if Qsync Central is not installed on the QNAP device, this CVE does not apply.
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Identify installed Qsync Central versionIn the QNAP admin console, go to App Center, find Qsync Central, and record the displayed version number. Alternatively, access the Qsync Central web interface and check the version information typically found in About or Settings.Affected if Unable to retrieve version information indicates Qsync Central may not be properly installed or accessible.
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Compare version against vulnerable rangeCompare your installed version number to the affected range: versions 4.5.0.3 through 4.5.0.6 are vulnerable. Versions below 4.5.0.3 or at/above 4.5.0.7 are not affected.Affected if The installed version is 4.5.0.3, 4.5.0.4, 4.5.0.5, or 4.5.0.6 - the system is within the vulnerable version range.
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Verify authentication is enabledCheck Qsync Central user authentication settings in the admin console under Qsync Central settings or User Management. Confirm whether local users or domain users can authenticate to access the Qsync service.Affected if Qsync Central has authentication disabled or permits unauthenticated access, the specific attack vector for this CVE (which requires an authenticated user) would differ, though other security concerns may exist.
The environment is affected only if Qsync Central is installed with version 4.5.0.3 through 4.5.0.6 and remote user authentication is enabled, allowing an authenticated attacker to exploit the path traversal vulnerability.
Generated from the published advisory. Verify against your own configuration.
Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.
dbcve · scoped4.5.0.7
Upgrade Qsync Central to version 4.5.0.7 or later. Until patched, limit user account privileges and monitor for anomalous file access patterns.
Qsync Central 4.5.0.7 or later
- Check the current version of Qsync Central installed on the system
- If the installed version is 4.5.0.3, 4.5.0.4, 4.5.0.5, or 4.5.0.6 (versions < 4.5.0.7), download and install Qsync Central version 4.5.0.7 or later from the official QNAP website
- After upgrading, verify that the installed version is 4.5.0.7 or higher to confirm the vulnerability is resolved
Generated from the published advisory — verify against the referenced sources before acting.
- Consultation2.0 h
- Implementation2.0 h
- Testing4.0 h
- Review / QA2.0 h
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Scan for this in your stack
Free · runs locallyCheck whether your project pulls in CVE-2025-33033 — or any other known-vulnerable package — straight from your lock files. Free and open source; it runs locally and uploads nothing.
References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.
Primary sourcesPractitioner notes
ContributedPeer-ranked notes from engineers who’ve handled CVE-2025-33033 in production — separate from our analysis above.
The advisory tells you what broke. It rarely tells you what actually worked. If you’ve dealt with this one, that detail is what the next engineer is searching for.
- The version that genuinely resolved it — not the one the vendor claimed
- A config change or rule that shut the vector down
- A gotcha in the upgrade path that cost you an afternoon
No notes yet
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- Verified mitigations, workarounds, and config changes
- Version or environment caveats, and links to real fixes
- No weaponised exploit code, or anything meant to cause harm
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